4-primary-color-based LED backlight for aircraft cockpit LCD

doi:10.3788/OPE.20152309.2459

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4-primary-color-based LED backlight for aircraft cockpit LCD

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- 4-primary-color-based LED backlight for aircraft cockpit LCD
- Optics and Precision Engineering Vol. 23, Issue 9, Pages: 2459-2465(2015)
- 作者机构：
  
  合肥工业大学光电技术研究院特种显示技术教育部重点实验室特种显示技术国家工程实验室现代显示技术省部共建国家重点实验室,安徽合肥,230009
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152309.2459
  CLC： TN312.8;TN27
- Received：25 March 2015，
  
  Revised：07 June 2015，
  
  Published：25 September 2015
- 稿件说明：
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冯奇斌, 尹慧娟, 李亚妮等. 用于机载液晶显示的四基色发光二极管背光源[J]. 光学精密工程, 2015,23(9): 2459-2465

FENG Qi-bin, YIN Hui-juan, LI Ya-ni etc. 4-primary-color-based LED backlight for aircraft cockpit LCD[J]. Editorial Office of Optics and Precision Engineering, 2015,23(9): 2459-2465
冯奇斌, 尹慧娟, 李亚妮等. 用于机载液晶显示的四基色发光二极管背光源[J]. 光学精密工程, 2015,23(9): 2459-2465 DOI： 10.3788/OPE.20152309.2459.

FENG Qi-bin, YIN Hui-juan, LI Ya-ni etc. 4-primary-color-based LED backlight for aircraft cockpit LCD[J]. Editorial Office of Optics and Precision Engineering, 2015,23(9): 2459-2465 DOI： 10.3788/OPE.20152309.2459.

摘要

针对机载液晶显示的特殊要求

设计了一种四基色发光二极管(LED)背光源。采用了能单独控制亮度的红、绿、蓝、琥珀等4种颜色的LED

以克服现有滤光片方法带来的夜模式下显示色域大幅下降的问题。在昼模式下工作时

4种颜色的LED同时发光

混合成白光;在夜模式下工作时

关闭红色LED以减少红外辐射

而绿、蓝、琥珀等3种颜色LED工作。计算了夜模式下3种颜色的混合配比。将蓝色LED的混光比例作为固定值代入昼模式下计算得到红、绿、琥珀的配比。仿真设计了采用红、绿、蓝三合一LED和单独琥珀色LED的背光源

分析了它们的性能

并开发了实际样品。测试结果表明:昼模式下

背光模块的发光强度为23 515 cd/m

(屏前亮度为1 175 cd/m

)

非均匀性为8.07%

色域为NTSC(National Television Standard Committee)的116.5 %;夜模式下

背光模块的发光强度为15.36 cd/m

(屏前亮度为0.77 cd/m

)

非均匀性为15.49%

色域为NTSC的83.5 %

满足机载液晶显示的要求。

Abstract

According to the special requirements of Liquid Crystal Display(LCD) in an airplane cockpit

a 4-primary-color-based LED(Lighting Emission Diode) backlight is developed. The LED backlight applies LEDs with 4 different colors of red

green

blue and amber to control the lightness independently. In the day model

all LEDs with different colors are turned on to form white lights. In the night mode

the red LEDs are closed to reduce infrared radiation. The mixed ratio of green

blue

and amber LEDs in the night model is first calculated. With the fixed luminance of blue LEDs

the ratios of red

green

and amber LEDs in the day model are decided. The detailed simulations are performed to decide the physical structures and optical characteristics of the backlight. The 3-in-1 LEDs with the individual amber LEDs are applied in a prototype. Experimental results show that the luminance

nonuniformity

and color gamut of the backlight in the day model are 23 515 cd/m

(1 175 cd/m

of panel brightness)

8.07%

and 116.5% NTSC(National Television Standard Committee)

respectively; and those in the night model are 15.36 cd/m

(0.77 cd/m

of panel brightness)

15.49%

and 83.5% NTSC

respectively. The developed backlight satisfies the requirements of luminance and night-vision-compatibility of aircraft liquid crystal display.

关键词

Keywords

references

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Related Institution

National Engineering Laboratory of Special Display Technology， Hefei University of Technology

Academy of Photoelectric Technology， Hefei University of Technology

School of Instrumentation and Opto-Electronics Engineering，Hefei University of Technology

School of Electronic Science &Applied Physics， Hefei University of Technology

Key Laboratory of Special Display Technology of the Ministry of Education, National Engineering Laboratory of Special Display Technology, National Key Laboratory of Advanced Display Technology, Academy of Photoelectric Technology, Hefei University of Technology

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